Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Chapter 46, Problem 4RQ
To determine
The temperature at which the room air-conditioning unit evaporators boils the refrigerant.
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Students have asked these similar questions
When a refrigeration system's suction line is noticeably cold instead of just being cool , it probably contains refrigerant .
A. high -pressure liquid
B. high -pressure vapor
C. low-pressure liquid
D. low -pressure vapor
Which process would best represent the opposite ofexhausting air from a system?A. CoolingB. VentilatingC. HeatingD. Filtering
Heat expulsion occurs in what section of a heat pump system when operating in the heat mode?
A. accumulator
B. evaporator
C. receiver
D. condenser
Chapter 46 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 46 - A typical room air-conditioning unit has _____(one...Ch. 46 - Prob. 2RQCh. 46 - The line that carries refrigerant into the...Ch. 46 - Prob. 4RQCh. 46 - Prob. 5RQCh. 46 - Prob. 6RQCh. 46 - Prob. 7RQCh. 46 - Prob. 8RQCh. 46 - Prob. 9RQCh. 46 - Prob. 10RQ
Ch. 46 - Prob. 11RQCh. 46 - Prob. 12RQCh. 46 - Describe the operation of the exhaust and...Ch. 46 - Why should gauges be installed only after there is...Ch. 46 - Prob. 15RQCh. 46 - Prob. 16RQCh. 46 - During the heat pump heating cycle, the hot gas...Ch. 46 - What are two methods used to evaporate condensate...
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- Quality means _________ when referring to a refrigerant.arrow_forwardWhat must be done when frost and ice build up on the outdoor coil of a heat pump?arrow_forward1. An air-source heat pump is a heat-pump system that uses air: a. as the system refrigerant. b. as the heat source when operating in the cooling mode. c. as the heat sink when operating in the heating mode. d. as the heat source when operating in the heating mode. 2. According to the Department of Energy, duct leakage can result in a energy loss? a. 10% b. 20% c. 30% d. 40% 3. As the outside ambient temperature drops, the efficiency of a heat-pump system operating in the mode will: a. heating, drop b. heating, rise c. cooling, rise d. Both a and c are correct.arrow_forward
- 9 Which of the following causes cooling in the room? a. Generator b. Absorbor c. Evaporator d. Condenserarrow_forwardWhich of the following is true regarding the refrigerantpiping on a rooftop package unit?A. The discharge and liquid lines must be field installed.B. The suction and liquid lines must be field installed.C. The discharge and suction lines must be field installed.D. No refrigerant lines are field installed.arrow_forwardto run d. both a and b 44. Ifa thermostatic expansion valve's thermal bulb came loose from the suction line at the outlet of the evaporator, whích of the following could result? The bulb pressure would increase and the c. thermostatic expansion valve would open. b. The superheat in the evaporator would decrease. a. Liquid refrigerant would flow back to the compressor. d. All of the above are correct. 45. If the thermal bulb assembly develops a leak, what will occur? All of the system's refrigerant will leak a. The valve will open to allow more c. refrigerant to flow. d. It will have no effect on system operation. out. b. The bulb pressure will reduce and the valve will close. 46. The purpose of an externally equalized thermostatic expansion valve is to compensate for excessive evaporator pressure drop b. allow system to equalize faster a. prevent the expansion valve from frosting up d. c. allow refrigerant to expand in the compressor 47. The primary function of an expansion device is…arrow_forward
- The typical temperature difference between the enteringair and the boiling refrigerant on a standard airconditioningevaporator is ______°F.arrow_forwardO b. True Which part in the mechanical heat pump is used to reduce the refrigerant pressure? Select one: O a. Expansion valve Compressor O c. Condenser O d. Evaporatorarrow_forwardUsually evaporator pressure in refrigeration system is ____________ A. 120 kN/mm2 B. 0.12 N/mm2 C. 0.12 N/cm2 D. 120 N/mm2arrow_forward
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